http://www.mediatraffic.de/alltime-album-chart.htm

87 - Taylor Swift Swift - 1989 (incl. Taylor's Version) Big Machine / Republic - 2014 (2023) - 18 million (will be quite a bit higher next year)

The Beatles have 7 albums on the list.

Micheal has 4 albums

Madonna ,Celine, Guns N Roses, Whitney and Eminem each have 3

Adele, Britney, Mariah, and The Backstreet Boys each have 2

Even Avril Lavigne, Ace Of Base and MC Hammer each have 1(for now)

Gaga didn't make the list with The Fame Monster which means The Fame & Monster sold less than 16 million worldwide when combined.

I'd imagine Taylor will get more albums on this list over time since her whole disography is like always selling. Midnights and Folklore are both already at about 10 million each. Give them 5 years and they will be on this list too. The Fame Monster or ASIB won't be though.